docs: def cli(env, sortby):
      """Account summary."""
  
      mgr = SoftLayer.NetworkManager(env.client)
      datacenters = mgr.summary_by_datacenter()
  
      table = formatting.Table(COLUMNS)
      table.sortby = sortby
  
      for name, datacenter in datacenters.items():
          table.add_row([
              name,
              datacenter['hardware_count'],
              datacenter['virtual_guest_count'],
              datacenter['vlan_count'],
              datacenter['subnet_count'],
              datacenter['public_ip_count'],
          ])
  
      env.fout(table)